LongIntUniqueRndValues.java

/**
 * Copyright 2011 JogAmp Community. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification, are
 * permitted provided that the following conditions are met:
 *
 *    1. Redistributions of source code must retain the above copyright notice, this list of
 *       conditions and the following disclaimer.
 *
 *    2. Redistributions in binary form must reproduce the above copyright notice, this list
 *       of conditions and the following disclaimer in the documentation and/or other materials
 *       provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * The views and conclusions contained in the software and documentation are those of the
 * authors and should not be interpreted as representing official policies, either expressed
 * or implied, of JogAmp Community.
 */

/**
 * Created on Sunday, March 28 2010 21:01
 */
package com.jogamp.common.util;

import java.util.HashSet;
import java.util.Random;

public class LongIntUniqueRndValues {

    public long[] keys;
    public int[] values;

    public LongIntUniqueRndValues(final int size) {
        // final int keySeed = 42;
        // final int valueSeed = 23;
        final Random keyRnd = new Random(/*keySeed*/);
        final Random valueRnd = new Random(/*valueSeed*/);

        final HashSet<Long> uniqueKeys = new HashSet<Long>(size);
        keys = new long[size];
        values = new int[size];
        while (uniqueKeys.size() < size) {
            final long k = keyRnd.nextLong();
            if( uniqueKeys.add( new Long(k) ) ) {
                final int i = uniqueKeys.size()-1;
                keys[i] = k;
                values[i] = valueRnd.nextInt();
            }
        }
    }
}